Once i sit up and go to the restroom im usually fine. Lots of external factors can trigger a pounding heart causing you to feel it strongest when you re lying still with no distractions. 8 Reasons You Re Waking Up At Night And How To Fix Them How To Not only will you wake up feeling comfortable but you are assured of a well rested night without waking up to a start. Sleep apnea wake up with heart racing . After surgery a patient with sleep apnea discovered she also had atrial fibrillation a serious irregular heart rhythm. It s not just exercise that can send your heart racing. Whether you know you have sleep apnea or suspect you might if you wake up and realize your heart is beating too fast or if your heartbeat feels irregular at any time of the day or night don t wait to seek help. If you wake up with a racing heart and trembling then a panic attack could likely be the cause. Untreated a fib is a risk factor for stroke. I feel like this happens when i am deep in sleep as...